Some expeditioners claim that they have seen anthropoid creatures roaming the surface of Xon, agile and cautious. Some claim that they even attacked them, seemingly extremely hostile to anything that is alien. It's possible that these creatures might be living in the caverns located under the planet's surface, which is a very large tunnel system. They are called "creatures" by the expeditioners, but what they exactly look like remains unknown, for they wear masks of some sort and wrapped in black clothes. The technology they use is both advanced and primitive, they have been reported using slingshots and energy weapons at the same time.